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<title>Section 2.10.&nbsp; Summary</title>
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<h3 class="docSection1Title">2.10. Summary</h3>
<p class="docText"><a name="idd1e17258"></a><a name="idd1e17261"></a><a name="idd1e17264"></a><a name="idd1e17269"></a><a name="idd1e17272"></a><a name="idd1e17277"></a>Much has happened over the past two decades with the standardization of the UNIX programming environment. We've described the dominant standardsISO C, POSIX, and the Single UNIX Specificationand their effect on the four implementations that we'll examine in this text: FreeBSD, Linux, Mac OS X, and Solaris. These standards try to define certain parameters that can change with each implementation, but we've seen that these limits are imperfect. We'll encounter many of these limits and magic constants as we proceed through the text.</P>
<p class="docText">The bibliography specifies how one can obtain copies of the standards that we've discussed.</P>

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